package demo2;

public class test {
}

abstract class B{
    public int a=19;
    public static String name="zhangsan";
    public void test02(){
        System.out.println("helo world");
    }
    public abstract void hi();
}
class C extends B{
    @Override
    public void hi() {
        System.out.println("hihihi");
    }
}